KR20150027425A - Flat wiper blade and combination method - Google Patents

Abstract

The present invention relates to a flat wiper blade and a combination method thereof. According to an embodiment of the present invention, the flat wiper blade comprises: a wiper strip (10) wiping a wiping surface; a mounting unit (100) having a first fitting stone unit (134) and an engaging unit (135); a guide spring (30) supporting the wiper strip (10), being coupled to the mounting unit (100) to be attached and detached while having a first fitting groove unit (34) in a central portion (32) wherein the first fitting stone unit (134) is inserted; and a first and a second spoiler (41, 42) coupled to the guide spring (30). In addition, the engaging unit (135) is hung on the first fitting groove unit (34).

Description

FIELD OF THE INVENTION [0001] The present invention relates to a flat wiper blade,

The present invention relates to a flat wiper blade and a joining method thereof.

Generally, a wiper blade is used to prevent disturbance of the driver's front clock by removing foreign matter, snow or rain during the running of the vehicle. The wiper blade drives the link device connected by the wiper arm so that the motor rotates repeatedly in a fan shape do.

The wiper blade includes an elongated wiper strip contacting the glass surface and a guide spring for holding and supporting the wiper strip along its longitudinal direction. Such a wiper blade with a guide spring is known in the art as a conventional wiper blade. 2. Description of the Related Art [0002] In recent years, as a guide spring of a wiper blade, a wiper blade which is bent at a predetermined curvature and uses a thin, long bar-shaped guide spring is used. Such wiper blades are known in the art as flat wiper blades or flat-bar wiper blades.

The flat wiper blade is lower in height than conventional wiper blades, has less air resistance, and can even contact the wiper strip with the glass surface with a uniform load. The flat wiper blade assembly having such a flat wiper blade includes an adapter portion provided at a central portion of the guide spring. The flat wiper blade assembly has the adapter portion detachably connected to the distal end of the wiper arm and connected to the wiper arm.

In such a conventional flat wiper blade, there is a flat wiper blade in which a guide spring and a seat portion are coupled using a plurality of grooves or holes formed in a central portion of a guide spring. The flat wiper blade has a groove or a hole formed at the center of the guide spring corresponding to the protrusion formed on the seat portion for engaging the seat portion with the guide spring. The groove or hole causes a problem that the stress of the guide spring is reduced when the curvature of the guide spring is generated. Here, stress is a resistance force generated in the inside by an external force.

Therefore, it is necessary to study a flat wiper blade capable of minimizing a groove or a hole in the center portion of the guide spring.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a flat wiper blade and a joining method thereof that can minimize a groove or a hole in a center portion of a guide spring.

A flat wiper blade according to the present invention comprises a wiper strip (10) for wiping a wiping surface; A seating portion 100 including a first fitting projection 134 and a locking portion 135; And a first fitting groove portion 34 for supporting the wiper strip 10 and detachably mounting the seat portion 100 and for inserting the first fitting projection portion 134 into the central portion 32 A guide spring 30; And first and second spoilers (41, 42) coupled to the guide springs (30); And the engaging portion 135 is engaged with the first fitting groove portion 34. [

The flat wiper blade also includes a wiper strip 10 for wiping the wiping surface; A seating part (100) including a locking part (135); A guide spring 30 which supports the wiper strip 10 and is detachably coupled to the seating part 100 and includes a first fitting groove part 34 formed on both sides of the center part 32; And first and second spoilers (41, 42) coupled to the guide springs (30); And the engaging portion 135 is engaged with the first fitting groove portion 34. [

The seating part 100 may further include a first fitting protrusion 134 and the first fitting protrusion 134 may be formed to be inserted into the first fitting groove part 34.

Here, the latching portions 135 may be a pair and may be spaced apart from each other.

Here, the engaging portions 135 may be formed to face each other.

Here, the first fitting groove 34 may be located at the center of the guide spring 30.

Here, the engaging portion 135 may be resiliently engaged with the first fitting groove portion 34.

The seating part 100 may further include a second fitting protrusion 133 and the guide spring 30 may further include a second fitting groove part 33 for inserting the second fitting protrusion 133 can do.

Here, the groove size of the second fitting groove portion 33 may be smaller than the groove size of the first fitting groove portion 34.

The seating part 100 may further include a second fitting protrusion 133 and the guide spring 30 may further include a second fitting groove part 33 for inserting the second fitting protrusion 133 And the size of the protrusion of the second fitting protrusion 133 may be smaller than the protrusion size of the first fitting protrusion 134.

The engaging portion 135 may include a locking protrusion 136 and the protrusion of the first fitting protrusion 134 may have the same size as the locking protrusion 136.

The method for assembling the flat wiper blade according to the present invention is characterized in that in the method of joining the guide spring 30 of the flat wiper blade and the mounting portion 100, the first fitting groove portion 34 of the guide spring 30 Inserting a first fitting protrusion (134) of the seating part (100); Wherein the seating part (100) and the guide spring (30) are in close contact with each other; The engaging part 135 of the seating part 100 is hooked to the first fitting groove part 34; .

The step of contacting the seating part 100 with the guide spring 30 may include a step of elastically deforming the holding part 135 upward when the seating part 100 and the guide spring 30 are in close contact with each other .

The engaging part 135 of the seating part 100 is engaged with the first fitting groove part 34 so that the engaging part 135 of the seating part 100 is engaged with the first fitting groove part 34 The seating part 100 moves in a direction in which the first fitting groove part 34 can be engaged and the hook part 135 is hooked to the first fitting groove part 34.

According to the present invention, it is possible to provide a flat wiper blade and a method of joining thereof, which can increase a stress of a guide spring by minimizing a groove or a hole in a center portion of a guide spring.

1 is a perspective view showing the entire configuration of a flat wiper blade assembly.
FIG. 2 is an exploded perspective view showing a state in which the flat wiper blade assembly of FIG. 1 is separated.
3A and 3B are perspective views illustrating one end and the other end of the wiper strip of FIG. 2, respectively.
4 is a perspective view showing the guide spring of FIG. 2. FIG.
Figs. 5A to 5C are views showing the seating portion of Fig.
FIGS. 6A to 6C are perspective views for explaining a method of assembling the seating portion of FIG. 2 and the guide spring of FIG. 2;
Figs. 7A to 7C are conceptual diagrams for explaining the connection between the engagement portion of the seat portion and the first fitting groove portion of the guide spring. Fig.
8 is a cross-sectional view taken along the line A-A 'shown in FIG. 6C.
FIG. 9 is a perspective view showing a state where the seat of FIG. 2, the guide spring of FIG. 2, and the spoiler of FIG. 2 are engaged.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings. The detailed description of the constituent elements of the present invention will be omitted so as not to obscure the gist of the present invention with respect to what can be clearly understood by a person skilled in the art and easily reproduced by the prior art.

<Embodiment>

Hereinafter, the overall configuration of the flat wiper blade assembly 1 will be described.

FIG. 1 is a perspective view showing the entire configuration of a flat wiper blade assembly, and FIG. 2 is an exploded perspective view showing a state in which the flat wiper blade assembly of FIG. 1 is separated.

1, a flat wiper blade assembly 1 according to the present invention includes a flat wiper blade 2 and a flat wiper blade 2 which are in close contact with a glass surface of a vehicle and are connected to a wiper arm (not shown) And an adapter portion (3) assembled at the central portion of the flat wiper blade (2).

Hereinafter, the flat wiper blade 2 will be described in detail.

As shown in Figs. 1 and 2, the flat wiper blade 2 includes a wiper strip 10 which is in close contact with a windshield of a vehicle and wipes a windshield face of the vehicle, a wiper blade 10 disposed on the wiper strip 10, A first spoiler 41 and a second spoiler 41 coupled to the guide spring 30 and a seat part 30 for coupling the adapter part 3 to the guide spring 30, 100).

The flat wiper blade 2 is connected to the front end of the wiper arm and receives a pressing force from the wiper arm against the glass surface of the vehicle glass. The wiper arm is reciprocally rotated at a predetermined angle by a wiper motor (not shown), whereby the flat wiper blade 2 wipes at a predetermined angle range from the glass surface (wiping surface) of the vehicle glass.

3A and 3B are perspective views illustrating one end and the other end of the wiper strip of FIG. 2, respectively.

2, 3A and 3B, the wiper strip 10 is disposed under the base portion 12 and the base portion 12 supported by the guide spring 30. The wiper strip 10 contacts the glass surface directly, And a wiping lip portion 13 for performing a wiping operation. The wiper strip 10 has a thin and elongated shape in the longitudinal direction of the flat wiper blade 2 and is made of an elastic material such as a rubber material or an elastic synthetic material so as to be in sliding contact with the glass of an automobile And removes foreign matter on the glass surface.

The base portion 12 is supported by a fastening hole 31 of the guide spring 30 and the fastening hole 31 may have a yoke shape. The base portion 12 and the wiping lip portion 13 extend continuously in the longitudinal direction of the wiper strip 10.

The wiper strip 10 may further include a backing plate 11. The base portion 12 may be provided with a receiving groove 14 through which two backing plates 11 parallel to each other in the longitudinal direction thereof can be received. Two backing plates 11, which are rectangular metal plates having spring characteristics, can be accommodated in the receiving grooves 14, respectively.

A holding portion 15, in which a fastening hole 31 is received in a sliding manner, extends in the longitudinal direction of the base portion 12. The wiper strip 10 has an opening at one end thereof so that a fastener 31 to be described later can be received therein. However, at the other end of the wiper strip 10, the movement of the fastener 31 The holding portion 15 is formed to be closed.

The holding portion 15 formed at the other end of the wiper strip 10 includes a slope 16 and a wall 17 formed at the terminating end. Further, the base portion 12 of the wiper strip 10 includes at least one protrusion 18 formed on the upper side.

The backing plate 11 applies elasticity and rigidity to the wiper lip portion 13. When a pressing force is applied from the wiper arm, the pressing force is distributed to the wiper strip 10 through the guide spring 30. At this time, the pressing force is dispersed in the longitudinal direction of the wiper strip 10 by the backing plate 11. Accordingly, the backing plate 11 has elasticity and has rigidity to maintain the shape of the wiper strip 10. [ A plurality of the backing plate 11 and the backing plate receiving groove 14 may be provided depending on the rigidity or elasticity of the wiper strip 10. [

Hereinafter, the guide spring 30 and the seating part 100 will be described in detail.

4 is a perspective view showing the guide spring of FIG. 2. FIG.

2 and 4, the guide spring 30 has a thin and elongated shape in the longitudinal direction of the flat wiper blade 2 and includes first and second side portions 35 and 36 located at both ends, And a central portion 32 located approximately centrally between the first and second side portions 35, 36. The first and second spoilers 41 and 42 are coupled to the first and second side portions 35 and 36 of the guide spring 30 and the seat portion 100 Is detachably coupled.

Here, the first and second side portions 35 and 36 are formed with grooves at predetermined intervals, so that the fasteners 31 can be fitted from the upper side to the lower side. However, it is not absolutely necessary that a separate fastening hole 31 be fitted, and the fastening hole 31 is formed integrally with the guide spring 30. Further, grooves may not be formed in the first and second side portions 35 and 36. The wiper strip 10 may be coupled to the fastener 31 after the guide spring 30 is inserted into the fastener 31 or a separate fastener 31 The guide spring 30 and the wiper strip 10 can be directly coupled to each other or the first and second spoilers 41 and 42 can be engaged with the guide spring 30 and the wiper strip 10 without the guide springs 30 and.

A pair of first fitting grooves 34 and a pair of second fitting grooves 33 are formed on both sides of the center portion 32 of the guide spring 30 in the width direction of the flat wiper blade 2.

Here, the groove size of the second fitting groove portion 33 may be smaller than the groove size of the first fitting groove portion 34. Here, the first fitting groove portion 34 may be located at the center of the guide spring 30. Here, the center position of the guide spring 30 is a position that does not affect the stress of the guide spring 30 when the guide spring 30 is curved.

Figs. 5A to 5C are views showing the seating portion of Fig.

5A is a perspective view of the seating part 100, FIG. 5B is a top view of the seating part 100, and FIG. 5C is a rear view of the seating part 100. FIG.

2, 4 and 5, the seating part 100 is configured to connect the guide spring 30 and the adapter part 3. The inner surface 150 of the seating part 100 has a guide spring 30, and the upper surface 110 is in contact with the adapter unit 3. [

A pair of second fitting protrusions 133 which can be inserted into the second fitting groove portion 33 of the guide spring 30 is formed at one side of the lower surface 120 of the seating portion 100, A pair of first fitting protrusions 134 are formed at the other side of the lower surface 120 of the first fitting groove portion 34. [

Here, the pair of second fitting projections 133 protrude in the direction opposite to each other, and the pair of first fitting projections 134 also protrude in directions opposite to each other. Here, the size of the protrusion of the second fitting protrusion 133 may be smaller than the protrusion size of the first fitting protrusion 134. The size of the protrusion of the first fitting protrusion 134 may be the same as the size of the protrusion 136 of the protrusion 135.

The seating portion 100 is formed with a pair of locking portions 135 that can be fitted in the first fitting groove portion 34 of the guide spring 30 and are spaced apart from each other. The pair of latching portions 135 may be formed in a direction facing each other. The latching part 135 may be positioned between the first fitting protrusion 134 and the second fitting protrusion 133 and may preferably be positioned at the longitudinal center of the fitting part 100. [ In addition, the pair of latching parts 135 includes a locking projection 136 protruding downward.

Hereinafter, the method of joining the seating part 100 and the guide spring 30 will be sequentially described with reference to FIGS. 5 to 7. FIG.

FIGS. 6A to 6C are perspective views for explaining a method of joining the seating portion of FIG. 2 and the guide spring of FIG. 2, and FIGS. 7A to 7C are views for explaining the connection between the engagement portion of the seating portion and the first fitting groove portion of the guide spring Fig.

6A is a perspective view showing a state before the seating part 100 and the guide spring 30 are engaged. FIG. 7A is a sectional view of the first and second fitting grooves 34 and 33 corresponding to FIG. 6A, The second fitting protrusions 134 and 133, and the locking protrusion 136. As shown in Fig.

6A and 7A, the second fitting protrusion 133 of the fitting part 100 is positioned to be inserted into the second fitting groove part 33 of the guide spring 30, and the first fitting protrusion 133 of the fitting part 100 The fitting portion 100 may be moved toward the guide spring 30 or the guide spring 30 may be inserted into the fitting portion 100 The second fitting protrusion 133 of the fitting portion 100 is inserted into the second fitting groove portion 33 of the guide spring 30 and the first fitting groove portion 34 of the guide spring 30 is seated The first fitting projection 134 of the part 100 is inserted.

The groove size of the second fitting groove portion 33 is larger than the size of the projection of the second fitting projection portion 133 and the groove size of the first fitting groove portion 34 is larger than that of the projection portion of the first fitting projection portion 134. [ Can be formed larger than the size.

FIG. 6B is a perspective view of the seating part 100 and the guide spring 30 in close contact with each other. FIG. 7B is a perspective view of the first and second fitting recesses 34 and 33, (134, 133) and the locking projection (136).

Referring to FIGS. 5, 6B and 7B, when the protrusions of the first and second fitting protrusions 134 and 133 are inserted into the grooves of the first and second fitting grooves 34 and 33, The guide spring 30 is brought into close contact with the inner surface 150 of the seat 100 when the seat 100 is pressed toward the seat 100 or when the seat 100 is pressed toward the guide spring 30.

 At this time, since the guide spring 30 is in close contact with the inner surface 150 of the seating part 100, the end of the holding part 135 is elastically deformed upward by the guide spring 30 . Therefore, the engaging portion 135 has elasticity downward. The guide springs 30 are slid in the longitudinal direction of the flat wiper blade 2 when the lower surface of the guide spring 30 is sufficiently close to the upper surface of the first fitting projection 134 and the second fitting projection 133, It is in a state that it can move.

6C is a perspective view showing a state where the seating part 100 and the guide spring 30 are engaged. FIG. 7C is a perspective view showing the first and second fitting recesses 34 and 33, the first and second fitting recesses 34 and 33, (134, 133) and the locking projection (136).

Referring to FIGS. 6C and 7C, the guide spring 30 and the seat 100 are coupled to each other by sliding in opposite directions. The guide spring 30 or the seating part 100 is moved in a direction in which the second fitting groove part 34 can be engaged with the locking projection part 136 in a state in which the guide spring 30 and the seating part 100 are in close contact with each other The engaging protrusion 136 is elastically hooked on the first fitting groove portion 34 of the guide spring 30.

The seat cushion 100 is moved in the direction of the arrow d shown in FIG. 7C by the surface c of the resiliently engaged first fitting groove portion 34 and the surface b of the engaging protrusion 136, ) Is constrained. Since the pair of latching portions 135 are formed in the directions opposite to each other, as shown in the enlarged view of FIG. 6C, the movement of the seating portion 100 in the arrow direction is restricted, Both longitudinal movements are constrained.

6 to 7, the locking protrusion 136 is elastically hooked to the first fitting groove portion 34. However, the present invention is not limited to this, and the locking protrusion portion 136 may be formed by a separate process It may be in the form that it is caught in the first fitting groove portion 34.

The first fitting protrusion 134 and the second fitting protrusion 133 are formed at the positions where the locking protrusion 136 of the seating portion 100 is elastically hooked on the first fitting groove portion 34 of the guide spring 30 And is positioned on the side surface of the guide spring 30 where the grooves are not formed. Therefore, the seat portion 100 is restrained from moving in the vertical direction, which is a direction perpendicular to the longitudinal direction of the flat wiper blade 2. Here, the second fitting protrusion 133 may be a minimum size that can restrain the vertical movement of the seating part 100. When the second fitting protrusion 133 is formed to have a minimum size, the second fitting protrusion 133 corresponding to the second fitting protrusion 133 is reduced in size, so that the stress of the guide spring 30 can be minimized .

8 is a cross-sectional view taken along the line A-A 'shown in FIG. 6C.

4 and 8, the gap L1 between the side portions 160 of the seating portion 100 is formed so as to cover a portion of the center portion 32 of the guide spring 30 on both sides thereof. Is preferably formed to be wider than the width (L2). The interval L3 between the pair of first fitting projections 134 is formed to be shorter than the width L2 of the central portion 32. [

FIG. 9 is a perspective view illustrating a state in which the seat of FIG. 2, the guide spring of FIG. 2, and the spoiler of FIG. 2 are engaged.

2, 4 and 9, a first spoiler 41 and a second spoiler 42 are coupled to the first side portion 35 and the second side portion 36 of the guide spring 30 . The manner in which the first spoiler 41 and the second spoiler 42 are fitted to the first side portion 35 and the second side portion 36 is not limited and may be carried out by a known technique, do.

When the first spoiler 41 and the second spoiler 42 are coupled to the guide spring 30 after the seat 100 is engaged with the guide spring 30, the first spoiler 41 or the second spoiler 41 42 further restrict the movement of the seat 100 in the longitudinal direction, thereby further preventing the seat 100 from being separated.

1 to 9, the guide spring 30 according to the embodiment is advantageous in that the number of grooves in the central portion is minimized, and the stress loss during the curvature of the guide spring 30 is reduced.

The guide spring 30 of the flat wiper blade 2 according to the embodiment is not only elastically engaged with the engagement protrusion 136 of the seating portion 100 in the first fitting recess 34 but also has the first fitting protrusion 134 can be inserted. Therefore, it is not necessary to separately form a groove or a hole for the locking projection 136, so that the manufacturing process is simplified and the manufacturing cost can be reduced.

The features, structures, effects and the like described in the embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects and the like illustrated in the embodiments can be combined and modified by other persons skilled in the art to which the embodiments belong. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be appreciated that many variations and applications not illustrated are possible. That is, each component specifically shown in the embodiments can be modified and implemented. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

1: flat wiper blade assembly 2: flat wiper blade
3: adapter part 10: wiper strip
30: guide spring 34: first fitting groove
33: second fitting groove portion 41, 42: first and second spoiler
100: seat part 134: first fitting projection
133: second fitting projection part 135:

Claims (14)

A wiper strip (10) for wiping the wiping surface;
A seating portion 100 including a first fitting projection 134 and a locking portion 135;
And a first fitting groove portion 34 for supporting the wiper strip 10 and detachably mounting the seat portion 100 and for inserting the first fitting projection portion 134 into the central portion 32 A guide spring 30; And
First and second spoilers (41, 42) coupled to the guide springs (30); Lt; / RTI &gt;
And the engaging portion (135) is engaged with the first fitting groove (34).
A wiper strip (10) for wiping the wiping surface;
A seating part (100) including a locking part (135);
A guide spring 30 which supports the wiper strip 10 and is detachably coupled to the seating part 100 and includes a first fitting groove part 34 formed on both sides of the center part 32; And
First and second spoilers (41, 42) coupled to the guide springs (30); Lt; / RTI &gt;
And the engaging portion (135) is engaged with the first fitting groove (34).
3. The method of claim 2,
The seating portion 100 further includes a first fitting projection 134,
And the first fitting projection (134) is adapted to be inserted into the first fitting groove (34).
4. The method according to any one of claims 1 to 3,
Wherein the engaging portions (135) are a pair and are spaced apart from each other.
5. The method of claim 4,
And the engaging portions (135) are formed in directions opposite to each other.
4. The method according to any one of claims 1 to 3,
And the first fitting groove portion (34) is located at the center of the guide spring (30).
4. The method according to any one of claims 1 to 3,
And the engaging portion (135) is resiliently engaged with the first fitting groove (34).
4. The method according to any one of claims 1 to 3,
The seating part 100 further includes a second fitting projection 133,
Wherein the guide spring (30) further comprises a second fitting groove (33) for inserting the second fitting projection (133).
9. The method of claim 8,
And a groove size of the second fitting groove part (33) is smaller than a groove size of the first fitting groove part (34).
The method according to claim 1 or 3,
The seating part 100 further includes a second fitting projection 133,
The guide spring (30) further includes a second fitting groove (33) for inserting the second fitting projection (133)
And the size of the protrusion of the second fitting protrusion (133) is smaller than the protrusion size of the first fitting protrusion (134).
The method according to claim 1 or 3,
The engaging portion 135 includes a locking projection 136,
And the size of the protrusion of the first fitting protrusion (134) is the same as the size of the locking protrusion (136).
In the method of joining the guide spring 30 of the flat wiper blade and the seat 100,
Inserting the first fitting protrusion (134) of the seating part (100) into the first fitting groove part (34) of the guide spring (30);
Wherein the seating part (100) and the guide spring (30) are in close contact with each other;
The engaging part 135 of the seating part 100 is hooked to the first fitting groove part 34;
Wherein the flat wiper blade is attached to the flat wiper blade.
13. The method of claim 12,
The step of the seating part (100) and the guide spring (30)
Wherein when the seating part (100) and the guide spring (30) are in close contact with each other, the engaging part (135) is elastically deformed upward.
13. The method of claim 12,
The step of hooking the engaging part 135 of the seating part 100 to the first fitting groove part 34
The seating part 100 moves in a direction in which the locking part 135 of the seating part 100 can be engaged with the first fitting groove part 34 so that the locking part 135) is engaged with the flat wiper blade.

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